bpf: Remove an unnecessary check.

The "i" here is always equal to "btf_type_vlen(t)" since
the "for_each_member()" loop never breaks.
Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20240203055119.2235598-1-thinker.li@gmail.comSigned-off-by: Martin KaFai Lau <martin.lau@kernel.org>

kernel/bpf/bpf_struct_ops.c

@@ -189,19 +189,16 @@ int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc *st_ops_desc,
 		}
 	}
 
-	if (i == btf_type_vlen(t)) {
 	if (st_ops->init(btf)) {
 		pr_warn("Error in init bpf_struct_ops %s\n",
 			st_ops->name);
 		return -EINVAL;
-		} else {
+	}
+
 	st_ops_desc->type_id = type_id;
 	st_ops_desc->type = t;
 	st_ops_desc->value_id = value_id;
-			st_ops_desc->value_type = btf_type_by_id(btf,
-								 value_id);
-		}
-	}
+	st_ops_desc->value_type = btf_type_by_id(btf, value_id);
 
 	return 0;
 }